1. What cards are possible options? 2. Are there good PCIe x1 video cards or Physx boards out there?3. Will PCI have sufficient throughput, so as to not bottleneck the system?4. If you have tried and it hasn't worked out for you, let me know...If it has, can you share your success?5. Since the cards physically obstruct the other slots, has anyone seen PCI or PCIe port extenders?

Not looking for people's opinions if you haven't tried it. Just from those who have and know.

#1 PhysX only works on Nvidia Geforce 8xxx series and newer. You can get a PCI-e x1 version of the 8400GS (the only PCI-e x1 card I could find that was PhysX capable), but I think even now it costs wayyyyy too much (cheapest I found was $95 and it was out of stock). You can get a PCI version of that as well, but I couldn't find any prices for that. Really, not worth the money IMO (and physX is a gimmick IMO as well), but you don't want opinions;-)#2 I know friends who have used their 8200 onboard video for PhysX and it worked fine. Won't take as much of the load, but will run, so I would guess PCI-e x1 or PCI would probably be OK, but may not be fantastic. #3 On top of all of this, you'll have to run hacked versions of drivers that allow PhysX and Nvidia cards to run at the same time as ATI cards and deal with lots of troubleshooting and little issues as you go. You can get all kinds of different slot extenders, risers, etc. that might make all of this easier, but you'll have to just go look for and find one that will fit under your 5850s.

Really, IMO- its gonna be way more money and trouble and time that its worth, but you can ignore this since its just my opinion.

Well, I have a friend who is running a 9600GSO and using the 8200 IGP on his MSI NF750-G55 AM3 NVIDIA nForce 750a SLI mobo for PhysX. I see that the Nvidia list says 8600GT, but he's running it, and thats where I was getting my info. My bad if I had wrong info.

2. Are there good PCIe x1 video cards or Physx boards out there?Not that I'm aware of.

3. Will PCI have sufficient throughput, so as to not bottleneck the system?I do not believe there are any PhysX capible cards for PCI. The original Agea PPU's may work on PCI, but they are not sold anymore, so you could possibly find it used, but keep in mind that there is no longer official support for these cards

4. If you have tried and it hasn't worked out for you, let me know...If it has, can you share your success?I have two 5870's in CF with an 8800GTS as a dedicated physX card. It works great when physX is needed. It's not needed often, but it also serves as a great desktop extender, without the headaches of running two monitors off one card.

5. Since the cards physically obstruct the other slots, has anyone seen PCI or PCIe port extenders?I believe your only option is a new mobo, or trading the 5850's for a 5970.

Thanks for the reply guys...I do like the opinions, just really want someone who has actually tried it...I might have to be that person.

All that Physx does is offload the Physics calculations from the CPU to the "PPU" or Graphics card. In the old Ageia card it worked in PCI or PCI-e x1. If you noticed those cards, they had a simple chip, with passive heatsinks, no output and the system didn't bottleneck at all.

I realize that was a while ago and why I am asking if there are people who may have done this.

How do we know that the PCIe x16 is a requirement when we can still purchase the ageia PCI and PCIe x1 cards (granted they are outdated)?

Since NVidia bought the company and Physx code and re-purposed it for the GPUs, I don't see why it wouldn't work using a card that plugs into a PCIe or a PCI slot, if one can be found.

That real world experience is what I am looking for. The person who can say..."Yeah I've done and it's cool and here's what I did and used" or" it dragged my system down and I ended up disabling it."

Thanks for the reply guys...I do like the opinions, just really want someone who has actually tried it...I might have to be that person.

All that Physx does is offload the Physics calculations from the CPU to the "PPU" or Graphics card. In the old Ageia card it worked in PCI or PCI-e x1. If you noticed those cards, they had a simple chip, with passive heatsinks, no output and the system didn't bottleneck at all.

I realize that was a while ago and why I am asking if there are people who may have done this.

How do we know that the PCIe x16 is a requirement when we can still purchase the ageia PCI and PCIe x1 cards (granted they are outdated)?

Since NVidia bought the company and Physx code and re-purposed it for the GPUs, I don't see why it wouldn't work using a card that plugs into a PCIe or a PCI slot, if one can be found.

That real world experience is what I am looking for. The person who can say..."Yeah I've done and it's cool and here's what I did and used" or" it dragged my system down and I ended up disabling it."

Thanks guys!

Ok , Now since it seems tat I might be the guy to break it to you, I'll be posting results and screenshots in the next few days here with the results that you want to know......This , seems to be like the same situation I got myself into while testing the 620X4 on an AM2 board....lol.... tons of opinions but no practical DIY stuff.Don't worry I'll give you the stuff in a day or two...

I want to see if it's possible with the hardware I have. Getting a new Motherboard like an X58 would mean getting a new proc. No Thanks.

I just updated my Video Cards to 2 x 5870s which was very expensive by itself. Awesome cards. Disappointed in the Game manufacturers though for only supporting Physics with Nvidia.

Batman: AA, Fear Series, Crysis, et.c are all games that can take and make use of Physics and provide the extra detail I am looking for, but without the dedicated hardware from Nvidia..relies on the CPU.

I want to see if it's possible with the hardware I have. Getting a new Motherboard like an X58 would mean getting a new proc. No Thanks.

I just updated my Video Cards to 2 x 5870s which was very expensive by itself. Awesome cards. Disappointed in the Game manufacturers though for only supporting Physics with Nvidia.

Batman: AA, Fear Series, Crysis, et.c are all games that can take and make use of Physics and provide the extra detail I am looking for, but without the dedicated hardware from Nvidia..relies on the CPU.

Alyoshka-How did it go with your testing?

and out of the three games listed, only batman uses physx, the other 2 can't be accelerated with NV card since they don't use physx